I just learned that linux shouldn't be called linux but GNU (or GNU/Linux)

I am a student and currently learning programming but also I looked into history and saw this interesting fact.

Basically, there was a guy who wanted to make operating system similar to unix but free to use and distribute. He called it GNU. After few years, it was getting finished but it was missing few parts. One of those parts was kernel. So people glued together this low level kernel called Linux, mid level GNU and some other stuff on top of it. It was first known as GNU/Linux and slowly GNU was kicked out of the name even though 'Linux' - the whole OS constisted more of GNU than Linux kernel.

Doesn't this seem like injustice? Am I wrong somewhere?